三聚磷酸钠对微细粒嵌布磁铁矿磨矿效果的影响  

Influence of Sodium Tripolyphosphate on Grinding Effect of Fine-grained Embedded Magnetite

作　　者：周文波[1] 朱照强 王永刚[2] 徐敏 彭畅 彭宇 ZHOU Wenbo;ZHU Zhaoqiang;WANG Yonggang;XU Min;PENG Chang;PENG Yu(College of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;Gansu Jiuquan Iron and Steel Group Hongxing Iron and Steel Co.,Ltd.,Jiayuguan 735100,China)

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081 [2]甘肃酒钢集团宏兴钢铁股份有限公司,甘肃嘉峪关735100

出　　处：《金属矿山》2023年第1期228-232,共5页Metal Mine

基　　金：省部共建耐火材料与冶金国家重点实验室青年基金项目(编号:2018QN19)。

摘　　要：为探究三聚磷酸钠对磁铁矿磨矿效果的影响,以新疆某微细粒嵌布磁铁矿石为研究对象,三聚磷酸钠为助磨剂,进行二段磨矿助磨剂条件试验,同时结合粒度分析、SEM、FTIR、矿浆黏度等检测结果,对三聚磷酸钠的助磨机理进行了探究。结果表明:在试验给定的相同磨矿条件下,加入1 kg/t三聚磷酸钠可使磨矿产品中-30μm含量提高12.65个百分点,-30μm粒级比生产率和磨矿效率分别提高了36.36%和34.54%,同时磨矿产品中磁铁矿的解离度提高了5.81个百分点,磁选精矿的品位提高了2.55个百分点。三聚磷酸钠通过降低矿浆的黏度、改变矿粒表面的吸附特性、减少矿粒表面吸附的微细矿粒、增加矿粒表面的微细裂隙等方式促进磁铁矿颗粒的粉碎,提高了磨矿效率。In order to explore the influence of sodium tripolyphosphate on the grinding effect of magnetite,a fine-grained disseminated magnetite ore from Xinjiang was taken as the research object,and sodium tripolyphosphate was used as the grinding aid for two-stage grinding condition tests.At the same time,combined with the test results of particle size analysis,SEM,FTIR,pulp viscosity,etc.,the grinding-aid mechanism of sodium tripolyphosphate was explored.The results showed that under the same grinding conditions given in the test,adding 1 kg/t sodium tripolyphosphate can increase the-30μm content in grinding products by 12.65 percentage points,and the-30μm particle size specific productivity and grinding efficiency are increased by 36.36%and 34.54%,respectively,while the dissociation degree of magnetite in grinding products increased by 5.81 percentage points,and the grade of magnetic separation concentrate increased by 2.55 percentage points.Sodium tripolyphosphate promotes the crushing of magnetite particles by reducing the viscosity of the pulp,changing the adsorption characteristics of the surface of the ore particles,reducing the fine ore particles adsorbed on the surface of the ore particles,and increasing the fine cracks on the surface of the ore particles,thereby improving the grinding efficiency.

关 键 词：三聚磷酸钠 微细粒磁铁矿 磨矿效率 助磨剂 

分 类 号：TD921.4[矿业工程—选矿]